Eyre Peninsula – Water Temperature Overview

This page provides information on Eyre Peninsula locations where sea water temperature data is available, including current conditions, monthly ranges and historical records.

Current Water Temperature

16.9°C

minimum

18.9°C

average

22.5°C

maximum

The current water temperature in the Eyre Peninsula today is within the range of 17-23°C. Thus, the average water temperature is about 19°C. Water in this range feels cool but still manageable for many swimmers. Short to moderate swims are comfortable, especially in warm weather. Some people may prefer a wetsuit for longer stays, particularly when swimming actively or outside peak summer conditions.

It’s important to note that these swimming tips and recommendations apply only in settled weather. When air temperatures drop below 20°C — and sometimes even below 25°C — swimming can feel uncomfortable, even when water temperatures are relatively high.

Sea Temperature Trends

Water Temperature Over the Last 60 Days

Over the past month, the sea water temperature has remained largely unchanged. Overall, the sea water temperature is within the range expected based on historical data for this month.

Water Temperature and Swimming Conditions by Month

Month	Min	Avg	Max
January	16°C	20°C	23°C
February	17°C	20°C	23°C
March	16°C	20°C	23°C
April	16°C	19°C	22°C
May	14°C	17°C	20°C
June	13°C	16°C	18°C
July	11°C	14°C	17°C
August	11°C	14°C	17°C
September	11°C	14°C	17°C
October	12°C	15°C	18°C
November	13°C	17°C	20°C
December	16°C	19°C	21°C

The Eyre Peninsula in South Australia offers a vast and rugged coastline, providing some of the most spectacular and diverse swimming experiences in the country. From the calm, turquoise waters of Port Lincoln and Coffin Bay to the wild surf beaches of the West Coast, the region's sea temperatures are defined by the temperate Southern Ocean. During the peak summer period in February, water temperatures typically range between 18°C and 23°C, offering a crisp and refreshing escape from the intense inland heat. As winter settles in around August, the temperature drops to a brisk 12°C to 16°C. While summer is the prime season for casual swimmers, the region’s active surf culture and world-class diving industry mean that many locals are in the water year-round, typically sporting a 3/2mm or 4/3mm wetsuit to manage the cool conditions and offshore winds.

Swimming Conditions

Swimming is permitted and widely celebrated across the peninsula, which is also famous for unique marine encounters such as swimming with wild sea lions and dolphins in Baird Bay. However, because much of the coastline is remote and untamed, swimming is strictly advised only at patrolled beaches or within the sheltered embayments of national parks like Lincoln or Coffin Bay. The primary reason for this caution is the prevalence of strong rip currents, heavy swells, and significant tidal movements that can be hazardous for those unfamiliar with the area. Beyond the physical conditions, the Eyre Peninsula is part of a sensitive marine ecosystem, and swimmers are often encouraged to stick to designated areas to protect fragile seagrasses and local wildlife. By swimming at supervised beaches between the red and yellow flags, visitors can safely enjoy the Eyre Peninsula’s pristine and often secluded waters.